Solid solvates of a NiII Schiff base complex and its reactivity towards GdIII

Resumen del trabajo presentado a la XXVI International Conference on Coordination and Bioinorganic Chemistry (ICCBIC), celebrada en Smolenice (Slovakia) del 4 al 9 de junio de 2017.Schiff bases prepared from ortho-vanillin and various diamines are ligands in a rich diversity of complexes, from mononuclear species to polymers. The complexes have interesting properties in a variety of fields – among them magnetism, luminescence, chirality, and catalysis. We have used targeted synthesis to prepare discrete heterodinuclear complexes with 3d-4f metal centers connected by the Schiff base ligand (H2L), which is prepared by condensation of ortho-vanillin and ethylenediamine in molar ratio 2:1. In the first step of the synthesis we isolated two solid solvates of NiL, namely [NiL]·H2O·EtOH and [NiL]·H2O·iPrOH; and in a subsequent step we obtained the heteronuclear compounds [NiLGdCl3(H2O)] and [NiLGd(NO3)3]·4MeCN from the reaction system [NiL] – LnIII. We present the structures of all four products. Possible causes are presented for some noteworthy differences between the two solid forms of the [NiL] compound, including different stabilities and colors of their crystals.Financial support from Slovak grant agencies (APVV-14-0078, VEGA 1/0063/17) is gratefully acknowledged, as is support from the Ministerio de Ciencia e Innovación (Spain, Grant MAT2015-68200-C2-1-P), the European Union Regional Development Fund (FEDER) and the Diputación General de Aragón, E16. AV thanks to grants VVGS-PF-2016-72623 and VVGS-2016-265.Peer reviewe